Other
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543327b&link_type=abstract
American Astronomical Society, AAS Meeting #215, #433.27; Bulletin of the American Astronomical Society, Vol. 42, p.374
Other
Scientific paper
We present a method for selecting quasars from other variable point sources using hypothesis testing, and apply it to SDSS Stripe 82 data for 52,000 variable objects. To describe quasar variability, we use a damped random walk model, as utilized in Kozlowski et al. (2009) to select quasars in very dense stellar environments. With the aid of a SDSS spectroscopically confirmed quasar sample, we demonstrate that variability selection in typical extragalactic fields with low stellar density can deliver samples with high completeness and low contamination rates. Variability selection and methods such as developed here will play an important role in the selection of quasars with data provided by upcoming large sky surveys such as the Large Synoptic Survey Telescope (LSST), particularly since our approach provides a complete statistical model of the selection process for any quantitative use of the sample.
Becker Andrew
Brooks Keira
de Vries Wim
Gibson Robert R.
Ivezic Zeljko
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